package com.loop.netty.websocket;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;

import java.time.LocalDateTime;

/**
 * WebSocketFrame 表示一个文本帧
 *
 * @author zhangxiaolu
 * @since 2023-09-16 22:00
 */
public class WebSocketFrameHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {
        System.out.println("服务器收到消息" + msg.text());
        // 回复消息
        ctx.channel().writeAndFlush(new TextWebSocketFrame("服务器时间：" + LocalDateTime.now() + " 收到消息：" + msg.text()));
    }

    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        // id 表示唯一的值，longText是唯一的，shortText不是唯一
        System.out.println("handlerAdded 被调用" + "\n" + ctx.channel().id().asLongText());
        System.out.println("handlerAdded 被调用" + "\n" + ctx.channel().id().asShortText());
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        System.out.println("handlerRemoved 被调用" + "\n" + ctx.channel().id().asLongText());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        System.out.println("exceptionCaught 被调用， 异常发生" + "\n" + cause.getMessage());
        ctx.close();
    }
}
